:root {
  --bg: #0b0f14; --panel: #11161d; --ink: #e6edf3; --muted:#9fb0c2;
  --accent:#58a6ff; --accent2:#7ee787; --chip:#1f2937; --warn:#f59e0b;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,"Helvetica Neue",Arial,"Noto Sans",sans-serif;background:var(--bg);color:var(--ink)}
a{color:var(--accent)}
.wrap{max-width:1200px;margin:0 auto;padding:24px;display:grid;gap:16px}
.row{display:flex;gap:16px;flex-wrap:wrap}
.panel{background:var(--panel);border:1px solid #1f2630;border-radius:16px;padding:16px}
.hero{display:flex;flex-direction:column;gap:20px;align-items:stretch}
.title{font-size:clamp(20px,2.2vw,28px);font-weight:700;text-align:center}
.subtitle{color:var(--muted);font-size:14px}
.controls{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
input,select,button{background:#0d1117;color:var(--ink);border:1px solid #222b36;border-radius:12px;padding:8px 10px;font:inherit}
button{cursor:pointer}
.grid{display:grid;grid-template-columns:repeat(18, 56px);column-gap:10px;row-gap:10px;place-content:start}
.el{width:56px;height:56px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:600;border:1px solid #253041;background:#0c131b;color:#c7d2e0;position:relative;padding-bottom:10px}
.el.placeholder{display:flex;align-items:center;justify-content:center;background:transparent;border:1px dashed #2a3646;color:var(--muted);pointer-events:none;font-size:12px;font-weight:500}
.el[data-type="metal"]{background:#17131f}
.el[data-active="1"]{outline:2px solid var(--accent);color:#fff}
.el .dot-row{position:absolute;left:8px;right:8px;bottom:6px;display:grid;grid-template-columns:repeat(4,1fr);align-items:center;min-height:12px}
.el .dot-slot{display:flex;align-items:center;justify-content:center;font-size:16px;line-height:1}
.el .dot-slot.has-dot::after{content:"•"}
.el .dot-slot.dataset.has-dot::after{color:var(--accent2)}
.el .dot-slot.pdos.has-dot::after{color:var(--accent)}
.el .dot-slot.cfg.has-dot::after{color:#f778ba}
.el .dot-slot.pldos.has-dot::after{color:var(--warn)}
.el .atomic-number{position:absolute;top:6px;left:8px;font-size:8px;font-weight:500;color:var(--muted)}
.el .symbol{pointer-events:none;font-size:22px;font-weight:700}
.el.series-lanthanide{margin-top:6px}
.el.series-actinide{margin-top:4px}
.legend{display:flex;gap:12px;align-items:center;color:var(--muted);font-size:12px}
.legend .legend-item{display:flex;align-items:center;gap:6px}
.legend .legend-dot{font-weight:700}
.legend .legend-dot.dataset{color:var(--accent2)}
.legend .legend-dot.pdos{color:var(--accent)}
.legend .legend-dot.cfg{color:#f778ba}
.legend .legend-dot.pldos{color:var(--warn)}
.chip{background:var(--chip);border:1px solid #2a3646;color:#d8e2ef;border-radius:999px;padding:4px 10px;font-size:12px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px}
.card{background:#0d1117;border:1px solid #202938;border-radius:14px;padding:12px;display:flex;flex-direction:column;gap:8px}
.card h4{margin:0;font-size:15px}
.card .meta{color:var(--muted);font-size:12px}
.card .tags{display:flex;flex-wrap:wrap;gap:6px}
.card .compare-btn{margin-top:4px;padding:6px 10px;border-radius:10px;border:1px solid #2a3646;background:#121a26;color:var(--ink);font-size:12px;transition:background .2s,border-color .2s,opacity .2s}
.card .compare-btn.active{background:#1d2a3a;border-color:#4e6d9a;color:#fff}
.card .compare-btn:hover:not([disabled]){background:#1d2a3a;border-color:#36506d}
.card .compare-btn[disabled]{opacity:0.4;cursor:not-allowed}
.kpi{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px}
.kpi .box{background:#0b1320;border:1px dashed #283447;border-radius:10px;padding:8px}
.kpi .label{color:var(--muted);font-size:11px}
#comparisonPanel{gap:12px}
.comparison-scroll{overflow-x:auto;display:flex;flex-direction:column;gap:18px;align-items:flex-start;width:100%}
.comparison-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:12px}
.comparison-title{font-weight:600;font-size:15px;margin-bottom:4px}
.comparison-status{font-size:12px;max-width:520px}
.comparison-grid{display:inline-block;min-width:100%;padding-bottom:12px}
.comparison-grid-content{display:grid;gap:8px;width:max-content;grid-auto-rows:auto;justify-content:flex-start}
.comparison-cell{background:#0b1320;border:1px solid #1c2633;border-radius:10px;padding:10px;display:flex;flex-direction:column;gap:6px;min-height:70px;min-width:280px}
.comparison-metric-header{font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:0.04em;color:var(--muted);justify-content:center;align-items:center;min-width:180px}
.comparison-metric-name{min-width:180px;font-weight:600;font-size:13px}
.comparison-value{font-size:14px}
.comparison-system-cell{gap:8px}
.comparison-system-title{font-weight:600;font-size:14px}
.comparison-system-meta{font-size:12px;color:var(--muted)}
.comparison-remove{align-self:flex-start;background:#1b2534;border:1px solid #2a3646;border-radius:999px;padding:4px 10px;font-size:11px;color:var(--ink);cursor:pointer;transition:background .2s,border-color .2s}
.comparison-remove:hover{background:#253449;border-color:#36506d}
.comparison-slot-placeholder{justify-content:center;align-items:center;color:var(--muted);font-size:12px;background:#0d1117;border-style:dashed}
.comparison-viewers{display:inline-flex;flex-direction:column;gap:18px;width:max-content;min-width:100%}
.comparison-viewer-row{display:grid;gap:8px;align-items:start;width:max-content;justify-content:flex-start}
.comparison-viewer-header{font-weight:600;font-size:13px;text-transform:uppercase;letter-spacing:0.05em;color:var(--muted);padding:10px;background:#0b1320;border:1px solid #1c2633;border-radius:10px;display:flex;align-items:center;justify-content:center;min-height:70px;min-width:180px}
.comparison-viewer-cell{background:#0b1320;border:1px solid #1c2633;border-radius:10px;padding:10px;min-height:120px;display:flex;flex-direction:column;gap:8px;min-width:280px}
.comparison-viewer-placeholder{color:var(--muted);font-size:12px;text-align:center;margin:auto}
.comparison-viewer-img{width:100%;max-height:200px;object-fit:contain;background:#03060a;border-radius:8px;border:1px solid #1c2633}
.comparison-pdos{width:100%;height:220px;background:#03060a;border-radius:8px;border:1px solid #1c2633}
.comparison-pdos-legend{display:flex;gap:12px;margin-top:6px;overflow-x:auto;padding-bottom:4px;white-space:nowrap}
.comparison-pdos-legend::-webkit-scrollbar{height:6px}
.comparison-pdos-legend::-webkit-scrollbar-thumb{background:#2a3646;border-radius:999px}
.comparison-pdos-legend-item{display:inline-flex;align-items:center;gap:8px;font-size:11px;color:#c7d2e0;background:#0b1320;border:1px solid #1c2633;border-radius:999px;padding:4px 12px;flex-shrink:0;cursor:pointer;font:inherit}
.comparison-pdos-legend-item.inactive{opacity:0.35}
.comparison-pdos-legend-item:focus-visible{outline:1px solid var(--accent);outline-offset:1px}
.comparison-pdos-legend-line{width:28px;height:2px;border-radius:2px;box-shadow:0 0 0 1px rgba(255,255,255,0.08)}
.comparison-regional-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}
.comparison-regional-cell{background:#091120;border:1px solid #1c2633;border-radius:8px;padding:6px;display:flex;flex-direction:column;align-items:center;gap:6px}
.comparison-regional-cell img{width:100%;max-height:120px;object-fit:contain;background:#03060a;border-radius:6px;border:1px solid #1c2633}
.ghost-btn{background:transparent;border:1px solid rgba(94,116,148,0.4);color:var(--muted);border-radius:999px;padding:6px 12px;font-size:12px;transition:color .2s,border-color .2s,background .2s}
.ghost-btn:hover{color:var(--ink);border-color:rgba(94,116,148,0.7);background:rgba(36,52,74,0.4)}
#pdosPlot{width:100%;height:520px;background:#03060a;border-radius:10px;border:1px solid #1c2633}
.pdos-toolbar{display:flex;gap:8px;margin-bottom:8px}
.pdos-toolbar button{background:#0d1117;padding:6px 12px;border-radius:10px;border:1px solid #222b36}
.pdos-toolbar button.active{background:#1d2740;border-color:#2b3a50}
.config-img, #configImg{width:100%;max-height:240px;object-fit:contain;background:#03060a;border-radius:10px;border:1px solid #1c2633}
/* PLDOS image styling */
#pldosImg{width:100%;max-height:240px;object-fit:contain;background:#03060a;border-radius:10px;border:1px solid #1c2633}
.regional-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.regional-col-header{text-align:center;font-size:13px;font-weight:600;color:var(--ink);background:#0b1320;padding:8px;border-radius:10px;border:1px solid #1c2633}
.regional-col-header .muted{color:var(--muted);font-weight:400;font-size:12px}
.regional-cell{background:#0b1320;border:1px solid #1c2633;border-radius:10px;padding:8px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;min-height:220px}
.regional-cell img{width:100%;max-height:180px;object-fit:contain;background:#03060a;border-radius:8px;border:1px solid #1c2633}
.regional-placeholder{color:var(--muted);font-size:12px;text-align:center}
.regional-row-annotation{grid-column:span 2;text-align:center;font-size:12px;color:var(--muted);margin-top:-4px;margin-bottom:4px}
.muted{color:var(--muted)}
.footer{color:#9fb0c2;font-size:12px;margin-top:20px}
.warn{color:var(--warn)}
.hidden{display:none}